KR100275773B1 - Character communication telephone using frequency tone - Google Patents

Abstract

PURPOSE: A character communication telephone using frequency tone is provided not to have a modem by corresponding and transceiving each DTMF(Dual Tone Multi-Frequency) to vowel and consonant. CONSTITUTION: A frequency tone detecting part(11) detects a frequency tone incoming from a telephone line. A transceiver(13) transmits and receives audio signal. A linger(18) derives ring signal incoming from the telephone line. A speaker(19) outputs the derived ring signal. A speech network(12) connects tone signal and audio signal transceived between the transceiver(13) and telephone line. Number/character key buttons(15) input a telephone number and characters. A displaying part(16) displays characters received and characters to be transmitted. A memory(17) stores DTMF of transmitted character. A micom controlling part(14) generates DTMF according to data inputted by the number/character key button, recognizes DTMF of transmitted character, and displays characters.

Description

Character communication telephone using frequency tone

The present invention relates to a two-way text communication phone, and more particularly to a two-way text communication phone using a frequency tone.

In general, a telephone performs a function of exchanging pseudo information by transmitting voice between users. In addition to these basic functions, various telephones have been developed to which auxiliary functions are added for convenience or special purpose of life. Among the phones with the auxiliary function, the text communication phone can receive and display texts sent by the other party and display them on the display, so that not only can the visual effect be displayed, but also those with a hearing impairment can exchange information easily. have.

The conventional text communication phone has a dial on the front panel of a telephone for entering a phone number, and a dial with buttons related to Korean consonants, vowels, and buttons related to transmission and reception, on one part of the front panel of the telephone separately from the number panel for dialing. Just as you type a character on the keyboard of your computer, you send a letter by pressing the button of the consonant and the vowel of the letter you want to send. In addition, by using a modem mounted inside the phone, data corresponding to a character was transmitted and received. Therefore, there is a problem that the unit price of the product increases due to the separate mounting of the modem and the dial.

In addition, other conventional text communication telephones transmit and receive text data using a modem embedded inside the telephone, but the same as the conventional text communication telephone, but does not include a letter board for inputting letters, but the buttons on the telephone number plate. It is improved to input characters using. However, there was still a problem to be equipped with a modem, and by using a method of selecting the consonants and vowels of the characters by successively pressing the number plate, the character input method was very complicated, which caused inconvenience. In addition, by using a modem, text communication was not possible at the same time.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an inexpensive and easy-to-use text communication telephone that does not require a separate button for entering text and a modem.

1 is a block diagram illustrating a text communication telephone using a frequency tone according to the present invention.

FIG. 2 is a view showing a numeric / character key button shown in FIG. 1.

3 is a flowchart illustrating an operation of a transmission mode in a text communication.

* Explanation of symbols for main parts of the drawings

10: rectifier, 11: frequency tone detector

12: speech network, 13: handset

14: microcomputer control unit, 15: numeric / character key button

16: display unit, 17: memory

18: ringer, 19: speaker

A text communication telephone according to the present invention for achieving the above object comprises a frequency tone detector for detecting a reception DTMF flowing from the telephone line; A handset for converting an electrical voice signal into an audible voice signal and converting the audible voice signal into an electrical voice signal; A speech network for connecting a voice signal to be transmitted or received with the handset and introducing a transmission DTMF to the telephone line; A numeric / character key button for inputting a character to be transmitted; A memory unit for storing character data input by the number / character key button and character data of the received DTMF; A display unit for displaying DTMF character data stored in the memory; And a microcomputer control unit for generating a DTMF corresponding to the character data input by the number / character key button and outputting the DTMF to the speech network and controlling the memory unit and the display unit.

In addition, the Hangul consonants of the number / letter key button is characterized in that assigned to the button using a dual structure.

In addition, the number / letter key button is characterized in that seven Korean consonants, one dual structure button and three buttons are assigned to the vowel.

In addition, the vowels assigned to the three buttons of the number / character key button are 'ㅣ', 'ㅡ', '.' And are combined with the buttons assigned to the consonants to input characters.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a text communication telephone using a frequency tone according to the present invention.

In FIG. 1, the text communication phone includes a rectifier 10 for lowering a 48V voltage flowing from an external telephone line into a logic power source, a frequency tone detector 11 for detecting a frequency tone introduced from a telephone line, and a handset 13 for transmitting and receiving a voice signal. ), A ringer 18 for driving a ring signal introduced from a telephone line, a speaker 19 for outputting a driven ring signal, a speech network for connecting a tone signal and a voice signal transmitted and received between the handset 13 and the telephone line ( 12), a numeric / character key button 15 for inputting a telephone number and a character, a display unit 16 for displaying received and transmitted characters, a memory unit 17 for storing DTMF of transmitted characters, and numeric / The DTMF is generated according to the data input through the character key button, and the DTMF of the transmitted character is recognized to recognize the DTMF of the transmitted character. And a microcomputer control unit 14 for displaying a character by controlling the am (16).

Referring to the operation according to the configuration of Figure 1, the reception DTMF introduced through the rectifier 10 for converting the 48V voltage flowing through the external telephone line to the logic power supply to each portion is introduced into the frequency tone detector 11. The frequency tone detection unit 11 detects the DTMF and outputs it to the microcomputer control unit 14. The microcomputer control unit 14 displays the characters corresponding to each DTMF on the display unit 16 and stores them in the memory 17. On the other hand, in the case of transmitting the character data to the other side by pressing the number / character key button 15 to complete the sentence, the number / character key button 15 by pressing the # button a predetermined number of times or more. First, press # button more than a predetermined number of times, and then select a transmission mode, and then immediately send it by pressing the button corresponding to the letter. In the microcomputer control unit 14, the text data is converted into DTMF and transmitted to the external telephone line through the speech network 12.

In the transmission method, since the DTMF is assigned to each numeric button, the microcomputer control unit 14 generates and transmits a DTMF corresponding to each character combined by the button. In this case, a separate frequency tone generator may be configured and operated without using DTMF.

FIG. 2 is a view showing a numeric / character key button shown in FIG. 1.

The Hangul combination using the numeric / character key buttons of the text communication phone of the present invention operates as follows. All Korean consonants can be represented by 14 consonants (B, B, B, D, K, K, K, K, K, K, K, K, K, K), so 14 buttons are required. If one consonant is used to assign two consonants to one button for the same purpose as a structural button, that is, a shift key of a computer keyboard, all consonants can be assigned with only seven consonant buttons and one dual structure button. That is, all eight consonants are represented.

In addition, the vowels of Hangul can be expressed as 10, ㅏ, ㅑ, ㅓ, ㅕ, ㅗ, ㅛ, ㅠ, ㅡ, ㅣ, where vowels can be expressed by "ㅣ", "ㅡ", "." So the vowel is assigned to three buttons. Therefore, Korean alphabet can be composed by combining consonants and vowels with 11 buttons.

The function of notifying the start of the text communication mode and the function of notifying the start of the text message should be added. The start of the text communication mode button is used to perform the function when the user presses the button repeatedly for more than a few seconds using one of the 11 buttons. The transmission start button is assigned to one button. At this time, according to the pattern of pressing the start button, the current state is distinguished from the end of one letter or the start of transmission. That is, for example, if the start button is pressed once, the present is the end of one letter, and if the button is pressed twice or more consecutively, the transmission is set to start and the microcomputer control unit 14 confirms the button input.

When combining the Hangul according to the button assigned the numbers, consonants and vowels shown in Figure 2 as follows. Press the number buttons 1, 2, 3, 4, 5, 6 and 7 to select a, b, ct, rt, rt, rt, s and select ㅇ, ㅈ, ㅋ, ㅋ, ㅍ, ㅎ To do this press the button * and then press the number buttons 1, 2, 3, 4, 5, 6 and 7. Press button 8 (ㅣ) and button 0 (·) in order to make a collection 'ㅏ', press buttons 0 (·) and 8 (ㅣ) in order to make 'ㅓ' and press button to make 'ㅗ'. Press 0 (·) and 9 (ㅡ) in order. If ㅘ ', press button 0 (·), 9 (ㅡ), 8 (ㅣ), 0 (·) in order. At this time, when the combination of one letter is finished, press the button # once to indicate the end of one letter, and when the desired sentence is completed, press the button # several times in succession to indicate that the character transmission starts.

3 is a flowchart illustrating an operation of a transmission mode in a text communication according to the present invention.

Referring to the operation according to the flowchart of FIG. 3, it is checked whether the text communication mode is present (step 41). If it is not the text communication mode, the phone communication mode is performed (step 42). If the character communication mode is input in step 41, when the sender presses a number / character key button 15 to input a character (step 44), the microcomputer control unit 14 converts the input data into character data, for example, an LCD (liquid crystal display). The character to be transmitted is displayed on the display unit 16, which is indicated by), and stored in the memory 17 (steps 45 and 46). In addition, the character data stored in the memory 17 is converted into DTMF and transmitted (step 47). On the other hand, the receiving side converts the received DTMF into text data and then displays the text on the display section 16 and stores it in the memory 17 (steps 48 to 51).

According to the present invention, by transmitting and receiving each DTMF combined by a telephone plate in correspondence with vowels and consonants, a modem is not required separately and text transmission and reception are possible during voice communication.

Claims (2)

A frequency tone detector for detecting a reception DTMF flowing from a telephone line; A handset for converting an electrical voice signal into an audible voice signal and converting the audible voice signal into an electrical voice signal; A speech network for connecting a voice signal to be transmitted or received with the handset and introducing a transmission DTMF to the telephone line; 7 buttons each assigned two consonants to input the character to be transmitted, one double structure button to select the consonant in combination with the button, and a numeric / character key with three buttons assigned to combine the vowel ; A numeric / character key button for inputting a character to be transmitted; A memory unit for storing character data input by the number / character key button and character data of the received DTMF; A display unit for displaying DTMF character data stored in the memory; And And a microcomputer control unit for generating a DTMF corresponding to the character data input by the number / character key button and outputting the DTMF to the speech network and controlling the memory unit and the display unit. The method of claim 1, wherein the vowels assigned to the three buttons of the number / character key button are 'ㅣ', '-', '.', And the characters are input in combination with the button assigned to the consonant. Text communication telephone using frequency tone.

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